-er -ic b-u bbb bbc bbe bbh bbi bbk bbr bbu bcb bcc bce bch bci bck bcr bcu be- beb bec bee beh bei bek ber beu bhb bhc bhe bhh bhi bhk bhr bhu bi- bib bic bie bih bii bik bir biu bkb bkc bke bkk bkr brb bre brh bri brk brr bru bub buc bue buh bui buk bur buu c-- cbb cbc cbe cbh cbi cbk cbr cbu ccb ccc cce cch cci cck ccr ccu ce- ceb cec cee ceh cei cek cer ceu ch- chb chc che chh chi chk chr chu ci- cib cic cie cih cii cik cir ciu ckb ckc ckh cki crb crc cre crh cri crk crr cru cub cuc cue cuh cui cuk cur cuu ebb ebc ebe ebh ebi ebk ebr ebu ec- ecb ecc ece ech eci eck ecr ecu eeb eec eee eek eer ehb ehc ehe ehh ehi ehr ehu eib eic eie eii eik eir eiu ekb ekc eke ekh eki ekr eku erb erc ere erh eri erk err eru eu- eub euc eue eui eur h-i hbb hbc hbe hbh hbi hbk hbr hbu hcb hcc hce hch hci hck hcr he- heb hec hee heh hei hek her heu hhb hhc hhe hhh hhi hhk hhr hhu hib hic hie hih hii hik hir hiu hkb hkh hki hkk hkr hku hr- hrb hrc hre hrh hri hrk hrr hru hub huc hue huh hui huk hur huu ibb ibc ibe ibh ibi ibk ibr ibu icb icc ice ich ici ick icr icu ie- iec iee iei iek ier ihb ihc ihe ihh ihi ihk ihr ihu iib iic iie iih iii iir iiu ikb ikc ike iki ikk ikr iku ir- irb irc ire iri irk irr iru iu- iub iuc iue iui iur kbb kbc kbe kbh kbi kbk kbr kbu kcb kcc kce kch kci kck kcr kcu ke- keb kec kee keh kei kek ker khe khh khi khk khr khu kib kic kie kih kii kik kir kiu kkb kkc kke kkh kki kkk kkr kku krc kri krk krr kru kub kuc kue kuh kui kuk kur kuu rbb rbc rbe rbh rbi rbk rbr rbu rcb rcc rce rch rci rcr rcu re- reb rec ree reh rei rek rer reu rh- rhb rhc rhe rhh rhi rhr rhu rib ric rie rih rii rik rir rkb rkc rke rkk rku rrb rrc rrh rri rrk rrr rru rub ruc rue ruh rui ruk rur ruu ubb ubc ube ubh ubi ubk ubr ubu ucb ucc uce uch uci uck ucr ucu ueb uec uee ueh uei uer uhb uhc uhe uhh uhi uhr uhu uib uic uie uii uir uiu ukb ukc uke uki ukk ukr uku ur- urb urc ure uri urk urr uru uuc uue uur uuu